FRESHWATER ALGÆ FROM TUDDAL IN TELEMARK. 151 



. 20. Elevation 3000 feet. July 10. 1919. 3 species. 

 On the floor of a primitive shovvder-bath. Temperature of 

 water, which was constantly running over: ca. 8° C. 

 Chroococcus pallidus, Chlorella vulgaris. 



21. Elevation 3000 feet. July 10. 1919. 39 specie.s. 

 Dinobryon sociale, Penium minutum, Tetmemorus granulatus, 



Brebissonii var. minor, Euastrum binale, affine, denticulatum, 

 Cosmarium humile, Cucurbita, Cucumis, Arthrodesmus octocornis, 

 Staurastrum gracile, margaritaceum, cuspidatum, hirsutum, Avi- 

 cula, orbiculare var. Ralfsii, Gymnozyga monoliformis, Hyalo- 

 theca dissiliens. 



22. Elevation 3000 feet. July 10. 1919. 12 species. 

 Chroococcus turgidus, macrococcus, Stigonema ocellatum, 



Trochiscia reticularis, Characiopsis crassi-apex, Microspora 

 stagnorum. 



23. Elevation 3000 feet. July 10. 1919. 73 species. 

 Chroococcus turgidus, Hapalosiphon Hibernicus, Gymno- 



dinium fuscum, Peridinium inconspicuum, Neliium Digitus, 

 Penium minutum, Cylindrus, Closterium Cornu, Archerianum, 

 Euastrum elegans, crassum, sinuosum var. reductum, pinnatum, 

 ansatum, denticulatum, Cosmarium pyramidatum, Cucurbita, 

 undulatum, Portianum, contractum var. ellipsioideum, depressum, 

 Staurastrum Ophiura, Sphærozosma granulatum, Oedogonium sp., 

 Mougeotia sp. 



24. Elevation 3000 feet. July 10. 1919. 18 species. 

 Tolypothrix tenuis, Stigonema mamillosum, Mougeotia sp., 



Gylindrocystis Brebissonii, Staurastrum sexcostatum, Oedogo- 

 nium sp. 



25. Elevation 3000 feet. July 10. 1919. 57 species. 

 Nostoc sphæricum, Stigonema ocellatum, Hapalosiphon 



Hibernicus, Glenodinium uliginosum, Euastrum elegans, sinuosum 

 var. reductum, denticulatum, Cosmarium taxichondrum, subtu- 

 midum, pseudopyramidatum, Blyttii, tumidum, amoenum, venus- 



